21. A surface receiving sound is moved from its original position to a positio related questions

21. A surface receiving sound is moved from its original position to a position three times farther away from the source of the sound. The intensity of the received sound thus becomesA. three times as low.B. nine times as low.C. three times as high.D. nine times as high.

a surface recieving sound is moved from its original position to a position three times farther away from the source of the sound. The intensity of the recieved sound thus becomes?a)three times as lowb)nine times as lowc)three times as highd)nine times as high?

Problem 1.66-Idk if this answer is right, please check??Given:NormalAllowed=6ksi for rods A&CFind: the min acceptable value for xe and the max acceptable value for xf_____________________________________Solution:Find max forcesFMax_A=6ksi*(1/4in)2*PiFMax_A=1.178kipsFMax_C=6ksi*(5/16in)2*PiFMax_C=1.841kipsFind min value for xe using momentsMD=0=2kips*xe-60in*1.178kipsxe=35.3inFind max value for xf using momentsMB=0=1.841kips*60in-2kips*xfxf=55.2in